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<?php /** * SCSSPHP * * @copyright 2012-2020 Leaf Corcoran * * @license http://opensource.org/licenses/MIT MIT * * @link http://scssphp.github.io/scssphp */ namespace ScssPhp\ScssPhp\Ast\Selector; use ScssPhp\ScssPhp\Extend\ExtendUtil; use ScssPhp\ScssPhp\Visitor\SelectorVisitor; use SourceSpan\FileSpan; /** * Matches any element in the given namespace. * * @internal */ final class UniversalSelector extends SimpleSelector { /** * The selector namespace. * * If this is `null`, this matches all elements in the default namespace. If * it's the empty string, this matches all elements that aren't in any * namespace. If it's `*`, this matches all elements in any namespace. * Otherwise, it matches all elements in the given namespace. */ private readonly ?string $namespace; public function __construct(FileSpan $span, ?string $namespace = null) { $this->namespace = $namespace; parent::__construct($span); } public function getNamespace(): ?string { return $this->namespace; } public function getSpecificity(): int { return 0; } public function accept(SelectorVisitor $visitor) { return $visitor->visitUniversalSelector($this); } public function unify(array $compound): ?array { $first = $compound[0] ?? null; if ($first instanceof UniversalSelector || $first instanceof TypeSelector) { $unified = ExtendUtil::unifyUniversalAndElement($this, $first); if ($unified === null) { return null; } $compound[0] = $unified; return $compound; } if (\count($compound) === 1 && $first instanceof PseudoSelector && ($first->isHost() || $first->isHostContext())) { return null; } if ($this->namespace !== null && $this->namespace !== '*') { return array_merge([$this], $compound); } // Not-empty compound list if ($first !== null) { return $compound; } return [$this]; } public function isSuperselector(SimpleSelector $other): bool { if ($this->namespace === '*') { return true; } if ($other instanceof TypeSelector) { return $this->namespace === $other->getName()->getNamespace(); } if ($other instanceof UniversalSelector) { return $this->namespace === $other->namespace; } return $this->namespace === null || parent::isSuperselector($other); } public function equals(object $other): bool { return $other instanceof UniversalSelector && $other->namespace === $this->namespace; } }
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